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Specialties Frequently Asked Questions

What is 304, 316, CF8 AND CF8M?304 and 316 are industry terminologies for stainless steel sheet material. CF8 and CF8M are in reference to rough finish stainless steel castings. 304 and CF8 have basically the same characteristics, resist all ordinary rusting, and are immune to food substances, sterilizing solutions, most of the organic chemicals, dye substances and a wide variety of inorganic chemicals. 316 and CF8M have basically the same characteristics and are optional materials used where a higher degree of corrosion resistance is needed as compared to 304/CF8.

What chemicals can stainless steel resist?This varies and the type of stainless steel (304 or 316) also may vary. Please refer to the ‘Corrosion Resistance Data Chart’ on page 9-16 of the Smith ‘Yellow Pages’ catalog. If the media you are researching is not listed, contact Smith’s Sales Engineering Department.

What is the ASTM classification for the cast iron used in Smith products?A-48-64 Class 25 or better gray cast iron.

What is the most commonly used grade of Stainless Steel used in drainage products?Type 304.